Agreed, this is an annoying feature and one that is a basic part of SMS and should be simple to fix. It is also annoying that long messages sent *from* web app get split into multiple SMS messages on phone (KitKat 4.4.2 / Hangouts).

Agreed. Long messages are split into multiple ones when being sent and received via MightyText. I'm guessing this is due to the 160 character limit, but they should be automatically combined and displayed like how they appear on the phone.